No exploitation reportedFix available

CVE-2019-18339

Q: Is CVE-2019-18339 actively exploited?

Active exploitation of CVE-2019-18339 has not been confirmed. Its EPSS score was 2.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-18339?

CVE-2019-18339 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-12-12
WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The HTTP service (default port 5401/tcp) of the SiVMS/SiNVR Video Server contains an authentication bypass vulnerability, even when properly configured with enforced authentication. A remote attacker with network access to the Video Server could exploit this vulnerability to read the SiVMS/SiNVR users database, including the passwords of all users in obfuscated cleartext.

Timeline

dates in UTC

2019-12-1219:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-18339?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-18339?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sinvr 3 central control server

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Siemens sinvr 3 video server

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-19-344-02 CISA3 known affected
Siemens and PKE SiNVR, SiVMS Video Server (Update A)
SiNVR/SiVMS Video Server: v5.0.0 and later is affected by CVE-2019-18340 · SiNVR 3 Central Control Server (CCS): all versions Moved to SSA-761844 and ICSA-21-103-10 · SiNVR/SiVMS Video Server: All versions prior to v5.0.0

Full record on NVD

Fix

Vendor fix CISA ICSA-19-344-02 · 3 productsSiemens recommends users to update to v5.0.0 or later.
Vendor fix CISA ICSA-19-344-02 · 3 productsSiemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk:
Vendor fix CISA ICSA-19-344-02 · 3 productsAs a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens ' operational guidelines for industrial sec…
Vendor fix CISA ICSA-19-344-02 · 3 productsAdditional information on industrial security by Siemens can be found at:https://www.siemens.com/industrialsecurity
Vendor fix CISA ICSA-19-344-02 · 3 productsFor more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens security advisory SSA-761617 and the PKE security advisory.

Advisories and patches

cert-portal.siemens.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.19.8read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-306read 2026-10-23
NVDweakness (CWE)CWE-306read 2026-10-23
FIRST EPSSEPSS score2.7 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-12-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-18339?

Is CVE-2019-18339 actively exploited?

Active exploitation of CVE-2019-18339 has not been confirmed. Its EPSS score was 2.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-18339?

CVE-2019-18339 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running SiNVR/SiVMS Video Server (All? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database